main: add re_nfds() and poll_method_get() getters (#435)

include/re_main.h

@@ -44,6 +44,7 @@ void  libre_close(void);
 int   re_main(re_signal_h *signalh);
 void  re_cancel(void);
 int   re_debug(struct re_printf *pf, void *unused);
+int   re_nfds(void);
 
 int  re_alloc(struct re **rep);
 int  re_thread_attach(struct re *re);
@@ -70,6 +71,7 @@ enum poll_method {
 };
 
 int              poll_method_set(enum poll_method method);
+enum poll_method poll_method_get(void);
 enum poll_method poll_method_best(void);
 const char      *poll_method_name(enum poll_method method);
 int poll_method_type(enum poll_method *method, const struct pl *name);

src/main/main.c

@@ -1170,6 +1170,32 @@ int re_debug(struct re_printf *pf, void *unused)
 }
 
 
+/**
+ * Get number of active file descriptors
+ *
+ * @return nfds
+ */
+int re_nfds(void)
+{
+	struct re *re = re_get();
+
+	return re ? re->nfds : 0;
+}
+
+
+/**
+ * Get current async I/O polling method.
+ *
+ * @return enum poll_method
+ */
+enum poll_method poll_method_get(void)
+{
+	struct re *re = re_get();
+
+	return re ? re->method : METHOD_NULL;
+}
+
+
 /**
  * Set async I/O polling method. This function can also be called while the
  * program is running.